OK Thanks.

It looks like the MAME project uses a confusing, non-standard definition of maximize and minimize. For every other app in the world, maximize means that the window containing the app is sized so that the window fills the screen, in at least one dimension if not both, and minimized means that the app is stuck on the task bar and the window contents aren't visible at all.

Apparently, the MAME developers for some reason use these terms to refer to unscaled an 2X scaled windows.

The prescale option still doesn't work, but I guess that needs to be filed against the MAME project and not QMC2.

Last edited by ScoobyDew; 09/20/15 09:41 AM.